Precision steel pipes have high dimensional accuracy, smooth inner and outer surfaces, and no oxide film on the inner and outer surfaces after heat treatment. The steel pipes have no cracks when expanded or flattened, and do not deform during cold bending. They can withstand high pressure and undergo various complex deformations and mechanical deep processing treatments.
Precision steel pipe process flow
Round bars - inspection - peeling - inspection - heating - perforation - acid pickling and passivation - grinding - lubrication and air drying - cold rolling - degreasing - cutting - inspection - labeling - finished product packaging
| Size tolerance |
|
|
|
|
|
| OD |
Standard tolerance |
Special tolerance |
| Outer Diameter |
GB/T3639 |
DIN2391 |
EN10305 |
O D |
thickness |
| 4mm-20mm |
±0.10 mm |
±0.08 mm |
±0.08 mm |
±0.05mm |
±0.05mm |
| 20mm-30mm |
±0.10 mm |
±0.08 mm |
±0.08 mm |
±0.08 mm |
±0.08 mm |
| 31mm-40mm |
±0.15 mm |
±0.15 mm |
±0.15 mm |
±0.10 mm |
±0.08 mm |
| 41mm-60mm |
±0.20 mm |
±0.20 mm |
±0.20 mm |
±0.15 mm |
±0.15 mm |
| 61mm-80mm |
±0.30 mm |
±0.30 mm |
±0.30 mm |
±0.20 mm |
±0.20 mm |
| 81mm-120mm |
±0.45 mm |
±0.40 mm |
±0.40 mm |
±0.30 mm |
±0.30 mm |
Crafted with meticulous attention to detail, our precision seamless steel pipe offers unparalleled accuracy and consistency,
perfectly suitable for the demanding needs of auto parts or motorcycle parts, ensuring optimal performance and durability in every application.
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